|substation = transmission|
|A place to connect and switch power transmission lines which transport power between production and consumption places. Inside voltage is mainly over 100 kV.|
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A transmission substation is a place whose main function is to connect and switch transmission lines transmitting power between areas. It is suggested to use this value for substations handling voltages above 100 kV since transmission grids in most parts of the world have a voltage of 110 kV or higher. A transmission substation may also feed a medium voltage distribution grid (typically having a voltage of less than 100 kV). Substations collecting power from one or more generators of a power plant should also be considered to be of this type.
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|380 kV substation with three 380/150 kV transformers. Unusual for using outdoor gas insulated switchgear (GIS).|